Dr. McGillicuddy's is a line of liqueurs produced in Canada and the United States by the Sazerac Company (acquired from Seagram in 1989).^[1][2][3][4] It comes in various flavors including Apple Pie, Butterscotch, Cherry, Coffee, Lemon, Mentholmint, Peach, Peppermint, Raw Vanilla, Root Beer, and Wild Grape.^[5] Dr. McGillicuddy's liqueurs are between 30 and 60 U.S. proof (15–30% alcohol by volume), depending on the flavor. The liqueurs are available in a range of bottle sizes 50 mL, 100 mL, 200 mL, 375 mL, 750 mL, 1 L and 1.75 L.^[6]

According to the brand website, a character named Dr. Aloysius Percival McGillicuddy created the liqueur. He lived in the late 19th century as a bartender in an old western town.^[7]

In 2016, Sazerac launched several Dr. McGillicuddy branded flavored whiskeys; Apple, Peach, Honey and Blackberry. They are all 60 proof.^[8] The flavored whiskey are available in bottle sizes 50 mL, 750 mL and 1 L.

In 2012, the brand was among the 100 largest selling brands by revenue among brands analyzed by SymphonyIRI, and had a market growth rate exceeding 100%.^[9]

The brand name has also been used by Sazerac for a New Orleans–based non-alcoholic root beer.^[10][11]

Originally, Fireball Cinnamon Whisky was labelled as "Dr. McGillicuddy's Fireball Whisky" when it was introduced by Seagram in the mid-1980s.^[3] The "Dr. McGillicuddy's" was dropped from the label in 2007, to differentiate it from the rest of the "Dr. McGillicuddy's" line.^[12][13][14]

Previously, the lineup included a Black Licorice, Black Pepper, Raspberry, and Lemon Drop liqueurs but the company web site does not currently list it as being available.^[5][15][16]